When Do I Need to File my Colorado State Taxes?

Article ID: 59650

Question

When Do I Need to File my Colorado State Taxes?

Answer

Due Date

The DR 0104 and any tax payment owed are due April 15, 2020. Revenue Online will accept returns as timely filed until midnight. Returns that are mailed must be postmarked by April 15. An automatic extension to file is granted until October 15, but there is no extension to pay. See page 27 for more information.